| Term | Definition |
|---|
| Acetylcholine | Neurotransmitter chemical released at the ends of some nerve cells |
| Autonomic Nervous System | Nerves that control involuntary body functions of muscles, glands, and internal organs |
| Axon | Microscopic fiber that carries the nervous impulse along a nerve cell |
| Brainstem | Lower portion of the brain that connects the cerebrum with the spinal cord |
| Cerebellum | Part of the brain that coordinates muscle movements and maintains balance |
| Cerebral Cortex | Outer region of the cerebrum |
| Cerebrospinal Fluid (CSF) | Fluid that circulates throughout the brain and spinal cord |
| Cerebrum | Largest part of the brain |
| Dendrite | Microscopic branching fiber of a nerve cell that is the first part to receive the nervous impulse |
| Ganglion | A collection of nerve cell bodies in the peripheral nervous system |
| Glial Cells | Cells in the nervous system that do not carry impulses but are supportive and connective in function |
| Meninges | Three protective membranes that surround the brain and spinal cord |
| Motor Nerves | Carry messages away from the brain and spinal cord to muscles and organs |
| Myelin Sheath | Fatty tissue that surrounds, protects, and insulates the axon of a nerve cell |
| Neuron | A nerve cell |
| Neurotransmitter | Cehmical messenger, released at the end of a nerve cell |
| Pons | Part of the brain anterior to the cerebellum and between the medulla and the rest of the brain |
| Receptor | Organ that receives a nervous stimulation and passes it on to nerves within the body |
| Synapse | The space (juncture) through which a nervous impulse is transmitted from one neuron to another or from a neuron to another cell, such as a muscle or gland cell |
| Thalamus | Main relay center of the brain |
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